Filter



F. R. MYERS June 13, 1950 FILTER v Filed Feb. l0, 1945 INVENTOR Freemail Myeng ATTORNEYS.

Patented June 13, 1950 UNITED .STATES PATENT osslcs signor .to The' New Britain Machine130111112111152,l New Britain, Conn.; a corporation of Con-e.,

ynecticuty This invention vrelates to filters for liquids.

`It is the general object ofthe invention topro- Vide an improved, simple form of filter.

It is another object of the Ainvention to pro-4 vide a filter so constructed and arranged .as to attain a substantial economy of space.

It is a further object of the invention to pro-` vide a filtration apparatus such that the `filter element Vis readily replaceable. Y

Other objects yand' various featuresy ofv noveltl7 and invention will' be hereinafter pointed -out or will become apparent -to thoseski-ll-ed in the art.

With these and other objects andadvantages in view, the invention consists in the features, combinations, details of construction and ar.- rangements of parts which will first be described in connection with the accompanying drawing and then more particularly pointed out.

. VInthe.drawing-- Fig. 1 is an isometric View of a filter supported. in position on-a stand;

Fig. 2 is a Vertical central sectional view on an enlarged scale of the filter shown in Fi-g. 1';

Fig. 3 is va sectional view'taken substantially in the plane of the line -3--3of Fig. '2. The lter in Aawprefer'red form includes Ja `shell formedin two parts for se-parat-ion as illustrated. I employ an 4uppercylindricalshell sectionv -5-and a similar lower sump-'section '6. The joint be tween the sections 5 and t` may be formed by -a circumferential channel fl in onev tank section and in the bottom `of that' channel theremay be a packing ring 8 upon which the bottom edge of the other tank section rests so that -a leak proof joint is formed. v

The two tan-k sections are -held together by suitable means and in the preferred for-ml v"ernploy a central rod -Qfwhichemaybe rigidly screwed to the sump section Y65 as by means of va screw thread l0 and lock nut Il a's .will be understood.

The rod S mayy freely through the -top of the section 5 and .a screw Aclamp l2 may be threaded on the upper end of the rod and engage the upper end of the tank section ora fitting i3 secured thereto so that'the twol sections 5-6 may be securely held together and in a leak proof manner. The filter element in the preferred form is so constructed and arranged that when the tank parts are separated the filter element and associated parts will remain with one tank section, in this case the lower section 6.

The filter element preferably includes a fabric bag ill which is doubled back upon itself around la screen spacer I5, preferably formed of wire mesh or lin-kY materialen as tol permit Aaires" passage of filtrate. In the for-m illustrated I employ a top-filtercapv `H5 -tvhich/has an :outlet passage l-'l therein. Ifhe :Filter-cap lr6 carries the screenl l5 depending therefrom, and in the for-rn illustrated, the upper 'end of thefsoreen'l fits into and `is held lin an annular. groove IH- formed between the depend-ing skirt t8 andv the Aouter edges of a vplurali-tyfof radial forming a .part of the filtercap. The filter cap maybe provided with a packing washer Aor gasket 2B fitting-ina suitable seat -in thefiilter vcap :as will fbefundere stood. This filtercap `:|46 isfres-ilierftly urged: up, wardly-so lvask-:to lclam-p2 thev filter bagfin tight engagement with the'insidenf 4the top of :the tank section '5 as will be flater described;

Inethe form 'illustrated the rod 9. carriesa slide ingcollar 2l whichcollar .isurgedf upwardiy :by means ofco'il spring-..22 interposed between the collar 21| :and a washer y23 supported .on the rod 9 las by .means of .a *.pinc24. Thenbottom ofthe filter bag fiel :is supper-.ted y.by ythe `collar 21| tand urged .upwardly lbiythe springen. .As illustrated, the bottom l.of .the .bagl' hasa-hole init for the passage of the rod :Sand is .supported on the collar 2| asbyrmeans Iof .a ring 24:1'. If desired,v the ring :24" may be formed .of wood :and the `.bottom of the abagmayabe tackedto it at internals as illustrated. I lmay .also-employ a washer 25 resting on the iilter bag and'aurged into .mengement with vseatsJ-Zii on the. ,fins or flanges 1.1.9.. Thus, the bag. he held in a leak proof man ner-,aganstzthe collar .assembly 2d.

The filter may be disassembled reassembled inl the following manner; the .screw clamp'flz is rammed-sonas: to permit `the ,sump Section5 toibe drappediaivayfromt opper ecce tieni, vwhich ina preferred form ll up. porte-:l as 'by meansfof straps 21??! car-r sehr the stand 28. The sump section 6 may :rest pn the -iloer the rod ".9 will be supported .upright )position inane :sump section. lhe :betteln ofthe ibag is thenslipned carer the rodi? ganarmas! rest on or be screwedA tofthe-slidercollar :2l :as heretofore described." "Bhe washer .25 em ployed) 4is then set. in place. Thereafter, fthe .filtercap SIZS isdropped iinnafvplacecve-r theiend .of thefrodil sothat the seat surfaces 'JE-S'cnfthe fns I9 rest on the bottom of the bag or on the Washer 25 (when employed). The open end of the bag may then be pulled over the screen spacer I5 like a sleeve and over the top of the screen carp I6 so that a part of the top of the bag rests on the sealing washer 23. Thereafter, the sump section 6 with the assembled filter bag and filter cap le 3 in place may be moved into the upper tank section 5 and the rod 9 will pass through the fitting I5 after which the screw cap l2 is put in place to make the assembly complete.

It will be seen that the spring 22 acting through the collar 2| will urge the bottom of the bag into tight fitting engagement with the filter cap I6 and the latter in turn will be resiliently urged upwardly so as to clamp the top of the filter bag in tight tting engagement with the tank section 5 as illustrated.

The liquid to be ltered, for example coolant from a grinding machine, is passed into the lter tank through the connection 30. Any heavier particles in the liquid will settle by gravity into the sump section 6. Since the liquid to be filtered, lls the entire tank, -the liquid will pass through both the inner and outer annular sides of the bag and into the screen spacer l5. The

filtrate passes freely through the spacer l5 andV upwardly between the ns I9, then through the passages Il and out the filtrate discharge 3l.

When it is desired to [clean the lter the pump `circulating the `coolant is shut off and thereafter the drain cock 32 is opened so as to drain the lter tank to a point below the joint between the two tank sections. Thereafter, the screw clamp l2 is removed and the sump section 6 together with the entire filter assembly is dropped down. The lter assembly may then be removed, the sump cleaned out and a fresh filter element applied as heretofore described, after which the parts may be reassembled for further ltering operation.

It will be seen that I have provided an extremely simple form of lter which permits the employment of a long bag lter within a comparatively small space. The lter element is resiliently clamped in place and .in leak proof manner by the mere assembling operation. The parts are few in number and simple .in `construction so there is little likelihood of any derangement of or injury to the filter parts.

The lter has been illustrated as supported on a stand 28, since that is a convenient method of supporting a coolant filter in any desired position relative to the machine in connection with which the filter operates. It will, of course, be understood that the filter could be otherwise supported, for example on the floor, and that the tank parts could be separated by removing the top section rather than the bottom section as described.

While the invention has been described in considerable detail, and a preferred form illustrated, it is to be understood that many changes and modifications may be made within the scope of the invention as defined in the appended claims.

I claim:

1. In a, filter, a tank formed of two separable parts one above the other, central supporting means carried by the lower of said parts and projecting vertically within the upper of said parts, securing means on the upper of said parts and engaging said supporting means for securing said two parts together, a ring slidable on said securing means and in sealing relation therewith, generally cylindrical screen means between said supporting means and the inner wall of said tank and including an upper peripherally extending portion conforming generally and in substantially longitudinal alignment with a peripherally extending portion of the inner wall of said upper part, said screen means also including a part in longitudinal alignment with apart of said ring, resilient means on said supporting means and urging said ring and said screen-means part together and urging said peripherally extending portions together, and a filter bag having in the bottom thereof a hole big enough to fit over said supporting means and small enough so that said bottom may rest on said ring; said lter bag extending between said ring and said screen-means part, then extending downwardly from said ring between said supporting means and said screen means, then around the bottom' of said screen means and upwardly outside of said screen means, then between said peripherally extending portions, and then generally radially inwardly of the locus of engagement of said peripher-ally extending portions, whereby a doubled-up filter bag may not only be resiliently urged into sealing engagement with said tank and with said supporting means, but the bag may be easily doubled-up in the process of assembling or servicing the lter.

2. A filter according to claim l, and including a ring of resilient material between said bag and one of said peripherally extending portions, whereby said resilient material may enhance the sealing rit of said bag at said peripherally extending portions.

FREEMAN R. MYERS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 579,769 Pich Mar. 30, 1897 609,769 Barr Aug. 30, 1898 689,307 Hermes Dec. 17, 1901 733,622 Brownlow July 14, 1903 1,047,413 Hopkins Dec. 17, 1912 1,148,237 Kneuper July 27, 1915 1,407,763 Langston Feb. 28, 1922 1,494,677 Feldmeier May 20, 1924 1,633,818 Hogstrom June 28, 1927 1,737,313 Kamrath Nov. 26, 1929 1,805,903 Bull May 19, 1931 1,840,153 Bull Jan. 5, 1932 2,000,137 Kelley May 7, 1935 2,007,615 Ross July 9, 1935 2,174,769 White Oct. 3, 1939 2,274,352 Wood Feb. 24, 1942 2,332,188 Andrews Oct. 19, 1943 2,339,703 Kamrath Jan. 18, 1944 FOREIGN PATENTS Number Country Date 9,421 France Aug. 19, 1908 (AddtiOrl t0 N0. 370,467) 

